F1 Check Power to Control Module

- Disconnect anti-lock brake wiring plug from anti-lock brake control module.

- Connect EEC-IV breakout box 014-00322 with Anti-Lock Test Adapter T90P-50-ALA to the Anti-Lock 55-pin plug wiring harness.

- Set multimeter to read volts DC.

- Turn ignition switch ON.

- Measure voltage between breakout box pins 53 and 60.

- Is voltage reading over 10 volts?

YES -- Go to F4. F4 Check Ground

NO -- Go to F2. F2 Check Anti-Lock Brake Control Module to Ground Wire